216843613 has 8 divisors (see below), whose sum is σ = 249080832. Its totient is φ = 184921296.

The previous prime is 216843607. The next prime is 216843647. The reversal of 216843613 is 316348612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216843613 - 2⁵ = 216843581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216843673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77245 + ... + 80002.

It is an arithmetic number, because the mean of its divisors is an integer number (31135104).

Almost surely, 2^216843613 is an apocalyptic number.

It is an amenable number.

216843613 is a deficient number, since it is larger than the sum of its proper divisors (32237219).

216843613 is a wasteful number, since it uses less digits than its factorization.

216843613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157451.

The product of its digits is 20736, while the sum is 34.

The square root of 216843613 is about 14725.6107852951. The cubic root of 216843613 is about 600.7801084266.

The spelling of 216843613 in words is "two hundred sixteen million, eight hundred forty-three thousand, six hundred thirteen".